Question:medium
Aphasia which affects the arcuate fibres (arcuate fasciculus) is called:
Aphasia which affects the arcuate fibres (arcuate fasciculus) is called:
Show Hint
Cutting the cable between Broca and Wernicke wrecks repetition.
Updated On: Jun 24, 2026
- Global aphasia
- Anomic aphasia
- Conduction aphasia
- Broca's aphasia
Show Solution
The Correct Option is C
Solution and Explanation
Step 1: Anatomy first: the arcuate fasciculus is the cable linking the comprehension area (Wernicke) at the back to the speech-output area (Broca) at the front.
Step 2: If you cut only this cable, both language areas still work, but they cannot talk to each other. The clinical result is conduction aphasia, which makes option c correct.
Step 3: Its signature finding is a striking inability to repeat phrases, even though the patient understands what is said and speaks fluently apart from sound errors (phonemic paraphasias). This contrasts with Broca's aphasia (non-fluent, frontal lesion), global aphasia (both centres destroyed, severe deficit in all language functions), and anomic aphasia (chiefly word-finding/naming trouble), so those options do not match an isolated tract lesion.
Step 4: So a lesion of the arcuate fibres yields conduction aphasia.
\[\boxed{\text{Conduction aphasia}}\]
Step 2: If you cut only this cable, both language areas still work, but they cannot talk to each other. The clinical result is conduction aphasia, which makes option c correct.
Step 3: Its signature finding is a striking inability to repeat phrases, even though the patient understands what is said and speaks fluently apart from sound errors (phonemic paraphasias). This contrasts with Broca's aphasia (non-fluent, frontal lesion), global aphasia (both centres destroyed, severe deficit in all language functions), and anomic aphasia (chiefly word-finding/naming trouble), so those options do not match an isolated tract lesion.
Step 4: So a lesion of the arcuate fibres yields conduction aphasia.
\[\boxed{\text{Conduction aphasia}}\]
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